==================================================================
BUG: KASAN: use-after-free in hlist_move_list include/linux/list.h:852 [inline]
BUG: KASAN: use-after-free in __collect_expired_timers kernel/time/timer.c:1484 [inline]
BUG: KASAN: use-after-free in collect_expired_timers kernel/time/timer.c:1719 [inline]
BUG: KASAN: use-after-free in __run_timers+0x4a8/0x6b0 kernel/time/timer.c:1783
Write of size 8 at addr ffff8881c2dc71c8 by task swapper/1/0
CPU: 1 PID: 0 Comm: swapper/1 Not tainted 5.4.197-syzkaller-00005-g704c7d053806 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/26/2022
Call Trace:
__dump_stack lib/dump_stack.c:77 [inline]
dump_stack+0x18e/0x1d5 lib/dump_stack.c:118
print_address_description+0x8c/0x630 mm/kasan/report.c:384
__kasan_report+0xf6/0x130 mm/kasan/report.c:516
kasan_report+0x30/0x60 mm/kasan/common.c:653
hlist_move_list include/linux/list.h:852 [inline]
__collect_expired_timers kernel/time/timer.c:1484 [inline]
collect_expired_timers kernel/time/timer.c:1719 [inline]
__run_timers+0x4a8/0x6b0 kernel/time/timer.c:1783
run_timer_softirq+0x46/0x80 kernel/time/timer.c:1800
__do_softirq+0x23e/0x643 kernel/softirq.c:292
invoke_softirq kernel/softirq.c:373 [inline]
irq_exit+0x195/0x1c0 kernel/softirq.c:413
exiting_irq arch/x86/include/asm/apic.h:538 [inline]
smp_apic_timer_interrupt+0x113/0x440 arch/x86/kernel/apic/apic.c:1150
apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:831
RIP: 0010:default_idle+0x1f/0x30 arch/x86/kernel/process.c:573
Code: 90 90 90 90 90 90 90 90 90 90 90 e8 3b 25 ff fd bf 01 00 00 00 89 c6 e8 bf ae 09 fd e9 07 00 00 00 0f 00 2d 53 f8 47 00 fb f4 1c 25 ff fd bf ff ff ff ff 89 c6 e9 a0 ae 09 fd 41 57 41 56 53
RSP: 0018:ffff8881f5defe88 EFLAGS: 00000296 ORIG_RAX: ffffffffffffff13
RAX: 0000000000000001 RBX: ffff8881f5dc6e40 RCX: ffff8881f5dc6e40
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000001
RBP: dffffc0000000000 R08: ffffffff821c7a14 R09: ffffed103ebb8dc9
R10: ffffed103ebb8dc9 R11: 1ffff1103ebb8dc8 R12: 0000000000000000
R13: 1ffff1103ebb8dc8 R14: ffffffff85e6c3a0 R15: 0000000000000001
default_idle_call kernel/sched/idle.c:94 [inline]
cpuidle_idle_call kernel/sched/idle.c:154 [inline]
do_idle+0x1d2/0x590 kernel/sched/idle.c:264
cpu_startup_entry+0x15/0x20 kernel/sched/idle.c:356
start_secondary+0x312/0x390 arch/x86/kernel/smpboot.c:264
secondary_startup_64+0xa4/0xb0 arch/x86/kernel/head_64.S:241
The buggy address belongs to the page:
page:ffffea00070b71c0 refcount:0 mapcount:0 mapping:0000000000000000 index:0x0
flags: 0x8000000000000000()
raw: 8000000000000000 0000000000000000 ffffea00070b7188 0000000000000000
raw: 0000000000000000 0000000000000000 00000000ffffffff 0000000000000000
page dumped because: kasan: bad access detected
page_owner tracks the page as freed
page last allocated via order 2, migratetype Unmovable, gfp_mask 0x152dc0(GFP_USER|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_ZERO)
set_page_owner include/linux/page_owner.h:31 [inline]
post_alloc_hook mm/page_alloc.c:2165 [inline]
prep_new_page+0x194/0x380 mm/page_alloc.c:2171
get_page_from_freelist+0x524/0x560 mm/page_alloc.c:3794
__alloc_pages_nodemask+0x2ab/0x6f0 mm/page_alloc.c:4857
__alloc_pages include/linux/gfp.h:503 [inline]
__alloc_pages_node include/linux/gfp.h:516 [inline]
alloc_pages_node include/linux/gfp.h:530 [inline]
kmalloc_order mm/slab_common.c:1342 [inline]
kmalloc_order_trace+0x2a/0xf0 mm/slab_common.c:1358
__kmalloc_node include/linux/slab.h:422 [inline]
kmalloc_node include/linux/slab.h:599 [inline]
bpf_map_area_alloc+0x47/0x90 kernel/bpf/syscall.c:149
prealloc_init kernel/bpf/hashtab.c:142 [inline]
htab_map_alloc+0x79a/0x11f0 kernel/bpf/hashtab.c:378
find_and_alloc_map kernel/bpf/syscall.c:122 [inline]
map_create kernel/bpf/syscall.c:573 [inline]
__do_sys_bpf kernel/bpf/syscall.c:2871 [inline]
__se_sys_bpf+0x2fe1/0xb990 kernel/bpf/syscall.c:2847
do_syscall_64+0xcb/0x1c0 arch/x86/entry/common.c:290
entry_SYSCALL_64_after_hwframe+0x44/0xa9
page last free stack trace:
reset_page_owner include/linux/page_owner.h:24 [inline]
free_pages_prepare mm/page_alloc.c:1176 [inline]
__free_pages_ok+0x7ee/0x920 mm/page_alloc.c:1438
free_the_page mm/page_alloc.c:4919 [inline]
__free_pages+0x45/0x1e0 mm/page_alloc.c:4925
kfree+0x1ef/0x260 mm/slub.c:4068
htab_free_elems kernel/bpf/hashtab.c:116 [inline]
prealloc_destroy kernel/bpf/hashtab.c:194 [inline]
htab_map_free+0x5a2/0x6f0 kernel/bpf/hashtab.c:1231
bpf_map_free_deferred+0xa6/0x100 kernel/bpf/syscall.c:311
process_one_work+0x6ca/0xc40 kernel/workqueue.c:2287
worker_thread+0xae0/0x1440 kernel/workqueue.c:2433
kthread+0x2d8/0x360 kernel/kthread.c:288
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:352
Memory state around the buggy address:
ffff8881c2dc7080: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
ffff8881c2dc7100: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
>ffff8881c2dc7180: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
^
ffff8881c2dc7200: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
ffff8881c2dc7280: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
==================================================================
BUG: kernel NULL pointer dereference, address: 0000000000000000
#PF: supervisor instruction fetch in kernel mode
#PF: error_code(0x0010) - not-present page
PGD 1de829067 P4D 1de829067 PUD 1de82b067 PMD 0
Oops: 0010 [#1] PREEMPT SMP KASAN
CPU: 1 PID: 0 Comm: swapper/1 Tainted: G B 5.4.197-syzkaller-00005-g704c7d053806 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/26/2022
RIP: 0010:0x0
Code: Bad RIP value.
RSP: 0018:ffff8881f6f09d30 EFLAGS: 00010202
RAX: ffffffff81519fb9 RBX: 0000000000000101 RCX: ffff8881f5dc6e40
RDX: 0000000000000101 RSI: 0000000000000000 RDI: ffff8881c2dc71c0
RBP: ffff8881c2dc71e0 R08: ffffffff81519d92 R09: fffffbfff0d3170d
R10: fffffbfff0d3170d R11: 1ffffffff0d3170c R12: 00000001000313e8
R13: 1ffff1103ede92f1 R14: 0000000000000000 R15: ffff8881c2dc71c0
FS: 0000000000000000(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffffffffffffd6 CR3: 00000001de827000 CR4: 00000000003406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
call_timer_fn+0x31/0x350 kernel/time/timer.c:1418
expire_timers+0x21e/0x400 kernel/time/timer.c:1463
__run_timers+0x5b0/0x6b0 kernel/time/timer.c:1787
run_timer_softirq+0x46/0x80 kernel/time/timer.c:1800
__do_softirq+0x23e/0x643 kernel/softirq.c:292
invoke_softirq kernel/softirq.c:373 [inline]
irq_exit+0x195/0x1c0 kernel/softirq.c:413
exiting_irq arch/x86/include/asm/apic.h:538 [inline]
smp_apic_timer_interrupt+0x113/0x440 arch/x86/kernel/apic/apic.c:1150
apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:831
RIP: 0010:default_idle+0x1f/0x30 arch/x86/kernel/process.c:573
Code: 90 90 90 90 90 90 90 90 90 90 90 e8 3b 25 ff fd bf 01 00 00 00 89 c6 e8 bf ae 09 fd e9 07 00 00 00 0f 00 2d 53 f8 47 00 fb f4 1c 25 ff fd bf ff ff ff ff 89 c6 e9 a0 ae 09 fd 41 57 41 56 53
RSP: 0018:ffff8881f5defe88 EFLAGS: 00000296 ORIG_RAX: ffffffffffffff13
RAX: 0000000000000001 RBX: ffff8881f5dc6e40 RCX: ffff8881f5dc6e40
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000001
RBP: dffffc0000000000 R08: ffffffff821c7a14 R09: ffffed103ebb8dc9
R10: ffffed103ebb8dc9 R11: 1ffff1103ebb8dc8 R12: 0000000000000000
R13: 1ffff1103ebb8dc8 R14: ffffffff85e6c3a0 R15: 0000000000000001
default_idle_call kernel/sched/idle.c:94 [inline]
cpuidle_idle_call kernel/sched/idle.c:154 [inline]
do_idle+0x1d2/0x590 kernel/sched/idle.c:264
cpu_startup_entry+0x15/0x20 kernel/sched/idle.c:356
start_secondary+0x312/0x390 arch/x86/kernel/smpboot.c:264
secondary_startup_64+0xa4/0xb0 arch/x86/kernel/head_64.S:241
Modules linked in:
CR2: 0000000000000000
---[ end trace 93891ffbeddae81b ]---
RIP: 0010:0x0
Code: Bad RIP value.
RSP: 0018:ffff8881f6f09d30 EFLAGS: 00010202
RAX: ffffffff81519fb9 RBX: 0000000000000101 RCX: ffff8881f5dc6e40
RDX: 0000000000000101 RSI: 0000000000000000 RDI: ffff8881c2dc71c0
RBP: ffff8881c2dc71e0 R08: ffffffff81519d92 R09: fffffbfff0d3170d
R10: fffffbfff0d3170d R11: 1ffffffff0d3170c R12: 00000001000313e8
R13: 1ffff1103ede92f1 R14: 0000000000000000 R15: ffff8881c2dc71c0
FS: 0000000000000000(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffffffffffffd6 CR3: 00000001de827000 CR4: 00000000003406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
0: 90 nop
1: 90 nop
2: 90 nop
3: 90 nop
4: 90 nop
5: 90 nop
6: 90 nop
7: 90 nop
8: 90 nop
9: 90 nop
a: 90 nop
b: e8 3b 25 ff fd callq 0xfdff254b
10: bf 01 00 00 00 mov $0x1,%edi
15: 89 c6 mov %eax,%esi
17: e8 bf ae 09 fd callq 0xfd09aedb
1c: e9 07 00 00 00 jmpq 0x28
21: 0f 00 2d 53 f8 47 00 verw 0x47f853(%rip) # 0x47f87b
28: fb sti
29: f4 hlt
* 2a: e8 1c 25 ff fd callq 0xfdff254b <-- trapping instruction
2f: bf ff ff ff ff mov $0xffffffff,%edi
34: 89 c6 mov %eax,%esi
36: e9 a0 ae 09 fd jmpq 0xfd09aedb
3b: 41 57 push %r15
3d: 41 56 push %r14
3f: 53 push %rbx